Question

Assertion: Acetic acid is more acidic in sodium acetate solution than in NaCl solution.

Reason: Adding a common ion prevents the weak acid or weak base from ionizing as much as it would without the added common ion.

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• C. Assertion is true but Reason is false
• D. Assertion is false but Reason is true
• E. Both Assertion and Reason are false

Answer 1

The correct option is D Assertion is false but Reason is true

Acetic acid is less acidic in sodium acetate solution than in NaCl solution due to common ion effect of acetate ion.

Adding a common ion prevents the weak acid or weak base from ionizing as much as it would without the added common ion. The common ion effect suppresses the ionization of a weak acid by adding more of an ion that is a product of this equilibrium.